Battery-box press



- Y 1930. J. A. LINDENBORG 1,759,703

BATTERY BOX PRESS Filed June 22, 1928 2 Sheets-Sheet. 1 v

II I 13 I 2,2 I: 5 2 22 x1 Z1 i 1 I 15 I 18 Z0 0 o 44 4i 4 o 44 4a I 44 4 o 43 41- M I 15 o o 1 40 I 4 q o o g a 2 gnvcfitoc John flhlgren Lindenbarg f Patented May 20, 1930 V UNITED, STATES PATIENT OFFICE JOHN AHLGREN LINDENBORG, OF INDIANAPOLIS, INDIANA, ASSIGNOR, BY MESNE ASSIGNMENTS, TO BATTERY CONTAINERS, INC., BOSTON, MASSACHUSETTS, A

CORPORATION OF MASSACHUSETTS BATTERY-BOX PRESS Application filed June 22,

The object of my invention is to produce an elficient hydraulic .press for facilitating the rapid and economical production'of articles, such as battery boxes, from a plastic, the construction being such that the completed article ma be readily removed from the moldwith less reakage than has heretofore been found to be commonly possible.

The accompanying drawings illustrate my invention.

Fig. 1 is a side elevation in partial vertical section of a press embodying my invention, Fig. 2, an end elevation, Fig. 3, a fragmentary vertical section of an intermediate portion of the press, the section being idealized to the extent that the lefthalf shows the wedge ring in molding position and the right half shows the wedge ring in article removal position, Fig.4, a fragmentary vertical section of the mold, wedge ring, press plunger, and pressed article in forming position and Fig. 5, a fragmentary perspective detail of the mold.

In the drawings '10 indicates a pedestal from which rise four corner posts 11 connected at their upper ends by a cross head 12 provided with a vertical cylinder 13. In cylinder 13 is a piston 14 carrying a piston rod 15 to the lower end ofwhich is secured a cross arm 16 from the ends of which depend vertical rods 17,17 each provided at its lower end with two vertically spacedcollars 18, 18.

Posts 11, at an intermediate point, are provided with collars 20, upon which is clamped .a pressure head 21 by means of nuts 22. The

head 21 bridges the space betweenthe four corner posts 11 andis hollow, as indicated in Figs. 1 and 3 to receive a heating medium such as steam through suitable supply'pipes (not shown) in the usual manner to maintain the press at proper temperature to produce vulcanization.

1928. Serial No. 287,382.

plates 34 which maybe readily varied in accordance with the particular ornamentation desired in the exposed faces of the articles to be formed.

The outer faces of plates 32, when said site sides, ears 44 which are perforated for sliding reception of rods 17 between collars 18, the vertical extent of the ears 44 being somewhat less than the space between collars 18 for a purpose which will appear.

Formed in pedestal 10 is a hydraulic cylinder within which is mounted a piston 51- which, at its upper end carries a mold table 52 guided at its corners upon the lower ends of rods 11 and adapted to support one or more vertical forming plungers 53 adapted to cooperate with the cavit or cavities of the mold or moldsformed y plates 32. (N

In the drawings I have indicated the table 52 as carrying two of these press plungers and cross head 21 carrying ,two molds. In the drawings the press plunger 53 is shown properly shaped to aid in the production of a three cell battery box. a

The parts are so proportioned that when piston 14 is near the upper end of its stroke wedge ring 41 will be tightly wedged up against the plates 32, and when piston 14 is at the lower end of it; stroke the upper end of wedge ring 41 will lie somewhat below the passages 42 fora heating lower ends of plates 32, ring 41 at this time I conveniently resting upon cross head 52.

The operation is as follows: Pressure in the lower end of cylinder 50 having been released, so that the press plungers 53 are in their lowest position, and pressure being admitted into the lower ends of cylinder 15 so asto drive piston 14 to its upper limit and thus 'firmly wedge ring 41 on to plates 32 to hold the mold elements firmly in position, a

proper mass of plastic dough, from which the article desired is to be made, is laid upon the upper ends of plungers 53 whereupon pressure is admitted into the lower end of 8 cylinder 50 and the lungers 53, with their superposed masses 0 dough, are driven up into the mold cavities as shown in Fig. 4 and the parts retained in this position until the tween wedge ring and the outer faces of plates 32, comparatively small and it is for this reason that I space the collars 18 further apart than the vertical height of the ears 4: so that, in order to remove ring 41 from molding position, I am able, by short reciprocations of piston 14, to hammer the ring 41 loose, instead of forcing it downwardly by pressure alone and I have found in practice that this hammering jars the mold f plates relative to the finished article in such way that it loosens those plates from the fin ished article thus facilitating the outward swing of those plates to release-the article.

I have found in practice that where the y '35 wedge ring is removed from the mold plates by. pressure alone, the mold plates have a tendency to stick to the outer faces 'of the finished article and in many instances the finished articles are ruined by the withdrawal of the mold plates. By moving the wedge ring downwardly below the mold I-find it possible for workmen to engage the lower ends of the mold plates by a prying tool in such manner that they can be arred loose from the faces of the finished article without damaging the article and at the same time the hands of the operator will be in such position as to keep the article from falling out of the mold -and breaking upon the press plunger.

I claim as my invention:

1. In a press mold, the combination of a cross head having a depending mold formed of depending mating elements, a press plungerarrang'ed below said mold, means for moving sa'id press plunger upwardly into the mold, a wedge ring movable upwardly into eight.

the wedge ring, whereby said wedge ring may be impacted downwardly by said moving means.

2. In a press mold, the combination of a cross head having a depending mold formed of depending mating elements, a (press plungof depending mating elements, a press plunger arrangement below said mold, means for moving said press plunger upwardly into the mold, a wedge ring movable upwardly into position to enclose the mating mold elements, and movable downwardly to a position below said mold elements, and means for striking an impact blow upon said ring to loosen it from the mold.

In witness whereof, I, -JOHN AHLGREN LINDENBORG, have hereunto set my hand at Indianapolis, Indiana, this 28th day of May, A. D. one thousand nine hundred and twenty- JOHN AHLGREN LINDENBORG.

position to enclose the mating mold elements and movable downwardly to a position below said mold elements, and means, supporting said wedge ring, for moving the same up and down said meanscomprising spaced abutments engaging the wedge ring and spaced apart a distance greater than the vertical dimension of the engaged portion of 

